Following criticism of last week's TV ad painting Democratic Senate front-runner Elizabeth Warren as a Wall Street sympathizer, conservative super PAC American Crossroads, the sister organization of Crossroads GPS, released a statement on Tuesday, claiming that money used by Warren via the Democratic Senatorial Campaign Committee is coming from Wall Street.

“Far left professor Elizabeth Warren should get a PhD in hypocrisy for trying to launder Wall Street political cash through the DSCC’s war chest while simultaneously leading the Occupy Wall Street movement,” said American Crossroads president Steven Law in a press release sent out Tuesday afternoon. “Professor Warren ought to put the DSCC’s Wall Street money where her mouth is: and just say no to DSCC support.”

Despite that latest claim, The Center for Responsive Politics, a nonpartisan journalistic website that tracks money in politics, revealed that the majority of Warren's contributions have come from small donations of less than $200.

"Since launching her U.S. Senate campaign in August, Warren has pulled in more than $3.15 million - with a whopping 57 percent of that sum coming from small-dollar donors who each contributed $200 or less," the group reported on its website Opensecrets.org. "According to research by the Center for Responsive Politics, Warren has raised just 3.5 percent of her war chest, or $110,050, from interests in the finance, insurance and real estate sector."

Crossroads GPS is a political action committee with ties to Republican strategist Karl Rove. The group has launched similar campaigns against democratic Senate contenders in Missouri, Montana and Nebraska.